1291350853 has 8 divisors (see below), whose sum is σ = 1396924928. Its totient is φ = 1186668144.

The previous prime is 1291350829. The next prime is 1291350869. The reversal of 1291350853 is 3580531921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291350853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291350253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219825 + ... + 225622.

It is an arithmetic number, because the mean of its divisors is an integer number (174615616).

Almost surely, 2^1291350853 is an apocalyptic number.

1291350853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1291350853 is a deficient number, since it is larger than the sum of its proper divisors (105574075).

1291350853 is a wasteful number, since it uses less digits than its factorization.

1291350853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445683.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1291350853 is about 35935.3705003858. The cubic root of 1291350853 is about 1088.9670805671.

The spelling of 1291350853 in words is "one billion, two hundred ninety-one million, three hundred fifty thousand, eight hundred fifty-three".